Yes its to late, even if it was 2 months ago it would be to late.
Why? Have you never heard of quarantine? From the looks of it u have 2 other snakes.
What if one u get is sick and all 4 die? Ponder that.
It can hurt the rest of his collection if one is sick you got a lot to learn.
And if they were your only 2 snakes and did not come from the same person i think that/you are incredibly stupid.